That´s true. Nobody is working on the up-armored versions. Not only the M1114 but the newest M1151/52.
I´ve been thinking on starting a new mod ala Combat! or BAS focused on US equipment only (Humvees, FMTs, MTVRs etc...) due to the lack of this kind of addons
But i´m just a 3D modeler/texturer (I´m working for a videogame studio so this is what I do every day) and a mod requires more people including scripters, O2 operators (I do my models in other 3d software) and so on. But hey! if someone is interested and your skills are high enough for this, we could talk about all this stuff.